Highly successful, widely trusted and globally applauded, international civil society organisations (ICSOs) such as Oxfam, Greenpeace and Amnesty International are major players on the global stage. However, fundamental change in the outside world threatens their role and future existence: Shrinking space for civic participation hinders their work in many countries; climate change, persistent poverty and growing inequality make it harder for them to achieve their missions; and the rise of the internet disrupts their business models. At the same time ICSOs are needed more than ever. Effective...